Hi, My sister -in-law has been given an upgrade by meteor , She had an I - phone 4 and her contract was up thus the upgrade, She still has the old I-phone 4 and has offered it to me, The thing is will I need to get it unlocked and if I do will they transfer my details to a new sim card as I have a samsung galaxy at the moment, Last thing is , Will I be able to stay on pay as you go, I will not be able to get to the shop for a few days so thought I would check with you first, Thank you, Regards Pablo123.